#include "sm4enc.h"
#include <openssl/evp.h>
#include <QDebug>
sm4enc::sm4enc()
{
}
QByteArray sm4enc::sm4Encrypt(const QByteArray& data, const QByteArray& key)
{
EVP_CIPHER_CTX* ctx = EVP_CIPHER_CTX_new();
if (!ctx)
{
qDebug() << "Failed to create context.";
return QByteArray();
}
if (1 != EVP_EncryptInit_ex(ctx, EVP_sm4_ecb(), nullptr, reinterpret_cast<const unsigned char*>(key.data()), nullptr))
{
EVP_CIPHER_CTX_free(ctx);
qDebug() << "Failed to initialize encryption.";
return QByteArray();
}
QByteArray encryptedData;
encryptedData.resize(data.size() + EVP_CIPHER_block_size(EVP_sm4_ecb()));
int len = 0;
int encryptedLen = 0;
if (1 != EVP_EncryptUpdate(ctx, reinterpret_cast<unsigned char*>(encryptedData.data()), &len, reinterpret_cast<const unsigned char*>(data.data()), data.size()))
{
EVP_CIPHER_CTX_free(ctx);
qDebug() << "Encryption failed.";
return QByteArray();
}
encryptedLen = len;
if (1 != EVP_EncryptFinal_ex(ctx, reinterpret_cast<unsigned char*>(encryptedData.data()) + len, &len))
{
EVP_CIPHER_CTX_free(ctx);
qDebug() << "Final encryption step failed.";
return QByteArray();
}
encryptedLen += len;
EVP_CIPHER_CTX_free(ctx);
encryptedData.resize(encryptedLen);
return encryptedData;
}
QByteArray sm4enc::sm4Decrypt(const QByteArray& data, const QByteArray& key)
{
EVP_CIPHER_CTX* ctx = EVP_CIPHER_CTX_new();
if (!ctx)
{
qDebug() << "Failed to create context.";
return QByteArray();
}
if (1 != EVP_DecryptInit_ex(ctx, EVP_sm4_ecb(), nullptr, reinterpret_cast<const unsigned char*>(key.data()), nullptr))
{
EVP_CIPHER_CTX_free(ctx);
qDebug() << "Failed to initialize decryption.";
return QByteArray();
}
QByteArray decryptedData;
decryptedData.resize(data.size());
int len = 0;
int decryptedLen = 0;
if (1 != EVP_DecryptUpdate(ctx, reinterpret_cast<unsigned char*>(decryptedData.data()), &len, reinterpret_cast<const unsigned char*>(data.data()), data.size()))
{
EVP_CIPHER_CTX_free(ctx);
qDebug() << "Decryption failed.";
return QByteArray();
}
decryptedLen = len;
if (1 != EVP_DecryptFinal_ex(ctx, reinterpret_cast<unsigned char*>(decryptedData.data()) + len, &len))
{
EVP_CIPHER_CTX_free(ctx);
qDebug() << "Final decryption step failed.";
return QByteArray();
}
decryptedLen += len;
EVP_CIPHER_CTX_free(ctx);
decryptedData.resize(decryptedLen);
return decryptedData;
}
linux Qt+sm4文件加解密 （234个子文件） 
libcrypto.so.3 4.96MB libssl.so.3 945KB libcrypto.a 8.91MB libssl.a 1.53MB sm4enc.cpp 3KB mainwindow.cpp 2KB main.cpp 172B obj_mac.h 174KB ssl.h 136KB evp.h 98KB x509v3.h 91KB ec.h 88KB cryptoerr_legacy.h 78KB x509.h 73KB asn1.h 60KB tls1.h 53KB x509_vfy.h 51KB core_dispatch.h 46KB cmp.h 40KB engine.h 39KB bio.h 39KB asn1t.h 36KB evp.h 36KB cms.h 33KB ocsp.h 29KB core_names.h 29KB rsa.h 27KB sslerr_legacy.h 26KB bn.h 26KB pem.h 25KB crypto.h 24KB ct.h 22KB pkcs7.h 22KB err.h 21KB sslerr.h 21KB aes_platform.h 19KB ts.h 19KB pkcs12.h 19KB ui.h 19KB safestack.h 18KB bulletproofs.h 18KB srp.h 15KB dh.h 15KB store.h 15KB crmf.h 14KB ssl3.h 14KB lhash.h 14KB x509.h 13KB dsa.h 12KB modes.h 11KB conf.h 10KB trace.h 10KB macros.h 10KB paillier.h 9KB ess.h 9KB des.h 8KB e_os2.h 8KB proverr.h 8KB md32_common.h 8KB core.h 8KB asn1err.h 8KB types.h 7KB params.h 7KB evperr.h 7KB nizk.h 7KB modes.h 7KB objects.h 7KB cmserr.h 6KB asn1.h 6KB rsa.h 6KB cmperr.h 6KB decoder.h 6KB rsaerr.h 6KB kdf.h 5KB ecerr.h 5KB encoder.h 5KB http.h 5KB ecx.h 5KB bn.h 5KB rand_pool.h 5KB x509v3err.h 5KB sha.h 5KB ec.h 4KB configuration.h 4KB rand.h 4KB ntls.h 4KB self_test.h 4KB opensslv.h 4KB rand.h 4KB aes.h 4KB sm2.h 3KB stack.h 3KB randerr.h 3KB x509err.h 3KB sparse_array.h 3KB async.h 3KB bioerr.h 3KB tserr.h 3KB ctype.h 3KB pkcs7err.h 3KB共 234 条
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